2157534630866 has 8 divisors (see below), whose sum is σ = 3291154521840. Its totient is φ = 1060483123588.

The previous prime is 2157534630859. The next prime is 2157534630907. The reversal of 2157534630866 is 6680364357512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9142095776 + ... + 9142096011.

It is an arithmetic number, because the mean of its divisors is an integer number (411394315230).

Almost surely, 2^{2157534630866} is an apocalyptic number.

2157534630866 is a deficient number, since it is larger than the sum of its proper divisors (1133619890974).

2157534630866 is a wasteful number, since it uses less digits than its factorization.

2157534630866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18284191848.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 2157534630866 in words is "two trillion, one hundred fifty-seven billion, five hundred thirty-four million, six hundred thirty thousand, eight hundred sixty-six".